[llvm-bugs] [Bug 39729] New: aarch64: Cannot select v8i8 = cttz

via llvm-bugs llvm-bugs at lists.llvm.org
Tue Nov 20 11:24:42 PST 2018


            Bug ID: 39729
           Summary: aarch64: Cannot select v8i8 = cttz
           Product: new-bugs
           Version: trunk
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: danielwatson311 at gmail.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org

aarch64 llvm.cttz.v8i8 gets this error:

LLVM ERROR: Cannot select: 0x5642a6b49e70: v8i8 = cttz 0x5642a6b49c68
  0x5642a6b49c68: v8i8,ch = CopyFromReg 0x5642a6ae17c8, Register:v8i8 %0
    0x5642a6b49c00: v8i8 = Register %0

build with -march=aarch64


llvm: 8.0.0svn

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